accreteoding systems the new dunes protect the existing foredunes, and in accreting systems the new dunes reduce sand supplies to the foredunes.
accrete X-rays, accreting black holes in their nuclei can be identified which would be very difficult to find in any other way.
accretemode is useful for monitoring rapidly variable sources, for example AGN or accreting binaries.
accretegoes back longer than anyone can remember, accreting gradually, with flare-ups following latent periods.
accretebsence of jets indicates that the star is not actively accreting material from this disk.